net: Simplify ipip6 aka sit pernet operations.

Take advantage of the new pernet automatic storage management,
and stop using compatibility network namespace functions.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 19 deletions

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index d9deaa7753ef..976e68244b99 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1164,17 +1164,8 @@ static void sit_destroy_tunnels(struct sit_net *sitn, struct list_head *head)
 
 static int sit_init_net(struct net *net)
 {
+        struct sit_net *sitn = net_generic(net, sit_net_id);
         int err;
-        struct sit_net *sitn;
-
-        err = -ENOMEM;
-        sitn = kzalloc(sizeof(struct sit_net), GFP_KERNEL);
-        if (sitn == NULL)
-                goto err_alloc;
-
-        err = net_assign_generic(net, sit_net_id, sitn);
-        if (err < 0)
-                goto err_assign;
 
         sitn->tunnels[0] = sitn->tunnels_wc;
         sitn->tunnels[1] = sitn->tunnels_l;
@@ -1201,37 +1192,33 @@ err_reg_dev:
         dev_put(sitn->fb_tunnel_dev);
         free_netdev(sitn->fb_tunnel_dev);
 err_alloc_dev:
-        /* nothing */
-err_assign:
-        kfree(sitn);
-err_alloc:
         return err;
 }
 
 static void sit_exit_net(struct net *net)
 {
-        struct sit_net *sitn;
+        struct sit_net *sitn = net_generic(net, sit_net_id);
         LIST_HEAD(list);
 
-        sitn = net_generic(net, sit_net_id);
         rtnl_lock();
         sit_destroy_tunnels(sitn, &list);
         unregister_netdevice_queue(sitn->fb_tunnel_dev, &list);
         unregister_netdevice_many(&list);
         rtnl_unlock();
-        kfree(sitn);
 }
 
 static struct pernet_operations sit_net_ops = {
         .init = sit_init_net,
         .exit = sit_exit_net,
+        .id   = &sit_net_id,
+        .size = sizeof(struct sit_net),
 };
 
 static void __exit sit_cleanup(void)
 {
         xfrm4_tunnel_deregister(&sit_handler, AF_INET6);
 
-        unregister_pernet_gen_device(sit_net_id, &sit_net_ops);
+        unregister_pernet_device(&sit_net_ops);
         rcu_barrier(); /* Wait for completion of call_rcu()'s */
 }
 
@@ -1246,7 +1233,7 @@ static int __init sit_init(void)
                 return -EAGAIN;
         }
 
-        err = register_pernet_gen_device(&sit_net_id, &sit_net_ops);
+        err = register_pernet_device(&sit_net_ops);
         if (err < 0)
                 xfrm4_tunnel_deregister(&sit_handler, AF_INET6);